EP 0496569 B1 19950315 - Thermal printing head and method of manufacturing the same.
Title (en)
Thermal printing head and method of manufacturing the same.
Title (de)
Thermodruckkopf und sein Herstellungsverfahren.
Title (fr)
Tête d'impression thermique et son procédé de fabrication.
Publication
Application
Priority
- JP 725791 A 19910124
- JP 725891 A 19910124
Abstract (en)
[origin: EP0496569A1] The present invention provides a thermal head capable of preventing any chipping between a glaze layer and a protective film, increasing an angle of separation in a thermal transfer ribbon and eliminating any step of abrading the protective film to prevent the separation of the thermal transfer ribbon and the darkened background of the heat-sensitive sheet, and a method of making such a thermal head. The thermal head includes a glaze layer 12 formed as a heat-accumulating layer on a substrate 11, resistance and electrode layers 13, 14 and 15 formed on the glaze layer 12 and a protective film 16 formed to cover the entire surface of the thermal head. The edge of the glaze layer 12 is totally cut with the upper cut edge thereof being rounded. The protective film 16 is formed directly on the cut edge of the glaze layer and the substrate. After the glaze layer has been formed, the edge portion of the glaze layer 12 is cut until reaching the substrate 11. Thereafter, the glaze layer is heated at a temperature equal to or higher than its softening point to round the upper cut edge of the glaze layer. The other layers are then formed. The formed layers are then covered with the protective film 16. Finally, a portion of the protective film 16 adhered to the substrate is cut at a position adjacent to the upper rounded edge of the glaze layer. <IMAGE>
IPC 1-7
IPC 8 full level
B41J 2/335 (2006.01)
CPC (source: EP US)
B41J 2/33525 (2013.01 - EP US); B41J 2/33535 (2013.01 - EP US); B41J 2/3355 (2013.01 - EP US); B41J 2/3356 (2013.01 - EP US); B41J 2/3359 (2013.01 - EP US); Y10T 29/49083 (2015.01 - EP US)
Designated contracting state (EPC)
DE FR GB IT NL
DOCDB simple family (publication)
EP 0496569 A1 19920729; EP 0496569 B1 19950315; DE 69201656 D1 19950420; DE 69201656 T2 19950713; US 5317341 A 19940531
DOCDB simple family (application)
EP 92300490 A 19920121; DE 69201656 T 19920121; US 81838192 A 19920109